ABSTRACT: BACKGROUND:Worldwide suicide is commonest in young people and in many countries, including the UK, suicide rates in young people are rising. AIMS:To investigate the stresses young people face before they take their lives, their contact with services that could be preventative and whether these differ in girls and boys. METHOD:We identified a 3-year UK national consecutive case series of deaths by suicide in people aged 10-19, based on national mortality data. We extracted information on the antecedents of suicide from official investigations, primarily inquests. RESULTS:Between 2014 and 2016, there were 595 suicides by young people, almost 200 per year; 71% were male (n = 425). Suicide rates increased from the mid-teens, most deaths occurred in those aged 17-19 (443, 74%). We obtained data about the antecedents of suicide for 544 (91%). A number of previous and recent stresses were reported including witnessing domestic violence, bullying, self-harm, bereavement (including by suicide) and academic pressures. These experiences were generally more common in girls than boys, whereas drug misuse (odds ratio (OR) = 0.54, 95% CI 0.35-0.83, P = 0.006) and workplace problems (OR 0.52, 95% CI 0.28-0.96, P = 0.04) were less common in girls. A total of 329 (60%) had been in contact with specialist children's services, and this was more common in girls (OR 1.86, 95% CI 1.19-2.94, P = 0.007). CONCLUSIONS:There are several antecedents to suicide in young people, particularly girls, which are important in a multiagency approach to prevention incorporating education, social care, health services and the third sector. Some of these may also have contributed to the recent rise.